Spray nozzle and tip



SPRAY NOZZLE AND TIP Filed Nov. 12, 1925 1 51 9]. 1 59.2. Fig.3, 59%

Fig. 5. Pig, 0.

I21 ven L01 I where it is desired to spray materials under Patented July19, 1927.

UNITED STATES JOHN D. MURRAY, 01' SAN FRANCISCO, CALIFORNIA.

SPRAY NOZZLE AND TIP.

Application filed November 12, 1925. Serial No. 68,657.

The present invention relates to a spray nozzle and Up designed forgeneral use pressure.

The objects of the present invention are to provide a tip which willautomatically control various widths of spray or film under variouspressures: to provide a tip which will automatically cut off any leakagetherefrom when the liquid applying pressure is cut oil; and to providean elastic tip which is inex ensive, durable, and is adaptable for usein the application of liquids or in sand blast apparatus.

With the above mentioned and other objects in view the inventionconsists in the novel construction and combination of parts hereinafterdescribed, illustrated in the accompanying sheet of drawings. and setforth in the claims hereto annexed, it being understood that variouschanges in form, proportion, size and minor details of constructionwithin the scope of the claims may be resorted to without departing fromthe spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings Fig. 1 is a view in side elevation of theelastic disc constituting the discharge tip of the spray nozzle.

Fig. 2 is a plan view of the disc with a small orifice in the center.

Fig. 3 is a plan view of the discsh wing the same provided with a slit.

Fig. 4 is a cross section of the disc showing its position when underpressure.

Fig. 5 is a plan view of the collar provided with a round orifice foruse in con nection with the disc illustrated in Fig. 2.

Fig. 6 is a plan view of the collar provided with an oval orifice foruse with the disc illustrated in Fig; 3.

Fig. 7 is a longitudinal central sectional view illustrating the slitteddisc held at the outlet end of the discharge pipe. 7

Fig. 8 is a view similar to Fig. 7 with the material to be applied underpressure illustrating the distortion of the slitted disc under workingconditions.

Referring to the drawings wherein like characters of reference designatecorresponding parts, the numeral 1 indicates the discharge end of aspraying pipe, having a peripheral threaded end 2. Through the bore 3passes liquid or other material under pressure supplied from anysuitable source,

not shown. Transversely across the end of pipe 1 with its innerperiphery against the end Wall is an elastic disc 4- prefcrably of,

of being provided with a spray orifice T.

which, upon the coupling of the parts 6 and 1. bears against the edge ofthe Vieldable disc 4, as shown in vFig. 8, thus holding the same firmlyin position between the end wall of the collar 6 and the end wall ofpipe 1. In operation, the fluid stream flow entering the tubular pipe 1.under pressure, will be forced out through the aperture 5 in the elasticdisc 4.

The pressure of the fluid flow against the disc distends the center ofthe same through the orifice 7 of the collar 6, which is the same shapebut of diameter larger than a ierture 5, and discharges through theorifice or aperture 5 in the elastic disc 4. The inper peripheral edgeof the wall 8 surrounding and facing aperture, is rounded or beveled asat 9 to reduce the liability of the elastic disc 4 becoming cut when thesame is distended under pressure through the orifice 7. The elastic disc4 may be provided with a slit 10 when it is desired to suppl a flatstream, and with it is employed a collar 6' having an oval aperture 7aligned with the slit 10. When a slitted disc is under pressure and anoval aperture-d collar 6' is provided, the central portion of spray orfilm will be of reater thickness than the film discharged rom the endsof said slit. This is occasioned by the fluid pressure against the disc4 distending the central portion and causing the slit to open to agreater degree at its center than at its ends.

It is to be noted that when the pressure against the disc 4 is reduced,the disc will return in proportion to the pressure to its normalposition, as shown in Fig. 8. and due to the elasticity of the disc andthe minuteness of the aperture 5 or slit 10, said aperture 5 or slit 10will close on the elimination of pressure behind the same precludingliquid leaking f'rom said tip.

The punctured or slitted elastic disc is equally as well adapted for usein sand blast apparatus as well as in liquid spraying apparatus, ithaving been established that the cutting action of sand or other hardparticles on the edges of the puncture or slit are reduced to a minimumdue to the elasticity,

flexibility and yieldahility of the disc structure.

Due to the elasticity of the disc 4. the same is self clearing of solidparticles forced against the rear thereof. the particles propelled hythe pressure distort the disc until they pass through the openingtherein The shape of the collars G and (3 and the orifice or slot; 10therein control the operative shape of the disc 4.

Having thus described my invention. what I claim as new and desire toprotect by Letters Patent of the United States is:

1. In combination with a spray pipe. an elastic disc disposedtransversely across the discharge end thereof and centrally puncturedatlording a spray orifice. and means for peripherally holding the discin position with its center Free for distension from its normal positionon the appli-ation of pressure to one face thereof, said means providedwith an orifice through which the disc is distended. said orifice lastmentioned controlling the. contour of the distended portion of the disc.

2. In combination with a spray pipe. an elastic disc disposedtransversely across the discharge end thereof and transversely slitaffording a spray orifice. the walls of which are normally in contact.and means for peripherally holding the disc to the outlet end of thespray pipe, said means provided with an oval orifice in alignment withthe slit and through which the disc is distended on the application ofpressure to one face thereof.

In testimony whereof I have signed my name to this specification.

JOHN D. MUR RA Y.

